@guy038 Thanks Guy, that worked!

Notepad++ v8.7.5 (64-bit)
Build time : Dec 21 2024 - 05:13:03
Path : C:\MEDIA\OFFICE\Notepad++\notepad++.exe
Command Line : “D:\My Documents\Desktop\Tasks\Hack Attack Stuff\Attack Log.txt”
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File Status Auto-Detection : cdEnabledNew (for current file/tab only)
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OS Name : Windows 10 Pro (64-bit)
OS Version : 22H2
OS Build : 19045.3930
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NppConverter (4.6)
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By “disable duplicate line?” are you asking how to disable or remove the keyboard shortcut for duplicating lines or are you asking about how to make Edit / Line Operations / Duplicate Current Line disappear from the menu structure?

I assume that since it’s happening accidentally that you are asking about finding and getting rid of the keyboard shortcut.

What happens when you do Ctrl+D which is the default keyboard sequence mapped to duplicate line?

• Specifically, open any file in Notepad++.

• Make sure the icon in the left side of the tab for the current file is normal and not the red that happens when there are unsaved changes.

• Do Ctrl+D

• If the icon did not change to red then we know that Ctrl+D is mapped to do something that does not make changes to the file and that we still don’t know why you are seeing duplicated lines at times. Don’t bother with the steps below but instead, let us know that Ctrl+D seemed to do nothing at all.

• If the tab icon changed red then it’s a clue that Ctrl+D made some change to the file and we now need to figure out what happened.

• Did Ctrl+D duplicate the current line or did it seem to do nothing? If you are working with a 100% blank file it may be hard to detect line duplication and so I’d type some stuff and then do a Ctrl+D again to see if the stuff is duplicated.

• Did Ctrl+D turn the icon red but seemed to do nothing even though you did Ctrl+D on a line with stuff on it? I would enable View / Show Symbol / Show Control Characters & Unicode EOL. If that was turned off then you are probably now looking at the letters EOT in white with a black background. That means the Ctrl+D is not mapped to anything and that you are adding an EOT character to the file each time you type Ctrl+D.

None of this will tell us exactly why lines are getting duplicated but will hopefully point the way to discovering why.

Can you post your Debug Info here?

• You must first run Settings > Shortcut Mapper... >

• Then, select the Scintilla Command tab

• And, finally, filter, for example, by the word selection

Best Regards,

guy038

I searched each tab one-at-a-time originally as you suggested in reply.

The SCI_SELECTIONDUPLICATE setting does exist and none of the keyboard options are set/checked however it clearly was still happening.

The very title of this thread is how to disable duplicate lines not remove duplicate lines. I was exceptionally clear about disabling the keyboard shortcut.

It’s in the shortcut mapper in the Scintilla commands tab and is SCI_SELECTIONDUPLICATE

When filtering is used in the shortcut mapper it only shows you matches in the current tab. If you were seeking something such as the the word duplicate then you need to flip though the tabs, one at a time, within the shortcut mapper.

Apparently, because it’s a Scintilla shortcut, the Ctrl-D shortcut does not show as a hint when you look at Edit / Line operations in the menus. It also does not show up in the shortcut mapper when you look in the main menu section. That seems like a bug to me but hopefully someone else will chime in with an explanation of the logic behind that.

FWIW, these commands may not do what you want, because they will delete ALL duplicate lines, and you may well have lines that are supposed to be duplicated (for example, close curly braces denoting the end of a code block). If you wanted to find duplicate lines, that is a job for regular expressions.